virginia association for pupil transportation 2010 annual meeting, richmond, virginia june 24, 2010...

Virginia Association for Pupil Transportation2010 Annual Meeting,

Richmond, VirginiaJune 24, 2010

Seat Belt Pilot Study Update: Seat Belt Pilot Study Update: Countdown to Final Report Countdown to Final Report

The Governor’s Task Group on School Bus Seat Beltsand the Alabama State Department of Education

Joe Lightsey

Director of Pupil TransportationAlabama State Department of Education

The Beginning, November 2006

• 71-passenger IC school bus with 42 students aboard crashed over an interstate bridge barrier and 30 feet to the ground below.

• Bus rode guard rail for 117 ft. • 4 fatalities and 37 injuries, 23 students treated and

released • Driver was not wearing seat belt!

Huntsville - November 20, 2006

School Bus Wheel Impacted Car

Huntsville - November 20, 2006

Huntsville - November 20, 2006

School Bus Driver Ejected

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Huntsville - November 20, 2006

Governor's Study Group on School Bus Seat Belts

• State Superintendent of Education• State Board Member• Director of Alabama DOT• Superintendent of Huntsville City Schools• Commissioner of Children’s Affairs• Director of Alabama DPS• Director of SDE Pupil Transportation

Governor’s Study Group on School Bus Seat Belts

• Thoughtful approach, no useful previous studies• Federal agencies did not know answers• DO NO HARM!• Recommendations:

– Push NHTSA on safety and performance standards.– Conduct a pilot study to gather own data. ($1.4 million)

Seat Belt Pilot Study

• Overall goal: Assess impact of installation of lap/shoulder seatbelts on a limited number Alabama school buses.

• 10 school systems

• 12 buses (3 manufacturers, 3 seat types, 3 digitalcamera systems, 6 buses with aides, etc.)

• Well-designed study

Alabama School Bus Facts

• 9,400 buses (89% < 10 years old)

• 467,000 daily route miles (84 million/yr)

• 377,000 students transported (51% of students)

• $704 annual cost per mile

• $873 annual cost per student

Alabama school bus passenger fatalities

5 since 1969

National School Bus Facts

• 20 pupil fatalities/year (75% are pedestrians loading or unloading the bus)

• In parent’s vehicle: 8 times more likely to die than on a school bus (NHTSA)

• Safety via large, heavy, rugged, compartmentalized vehicle with trained drivers

Seat Belt Pros and Cons• They work in cars.• Children should be trained to wear seat belts in every

vehicle.• Little advancement in passenger vehicle safety since

1977 (compartmentalization)

• Little scientific research to demonstrate significant reduction in deaths or injuries

• Compartmentalization currently provides excellent safety for child passengers

• Safest form of student transportation

State Seat Belt LegislationState Seat Belt Legislation

• New York: New York: 1984 made use optional (2-point belts)

• New JerseyNew Jersey: : 1992 made belt use mandatory

• Florida:Florida: buses purchased after Dec 31, 2000 to be equipped with safety belts

• California:California: 2004 – lap/shoulder belts required on all new buses

• LouisianaLouisiana:: 2006 - seat belts required on new buses, when Legislature provides funds

• Texas:Texas: 2007 - lap/shoulder belt required on buses purchased after Sept. 1, 2010

Will answer national questions.Most comprehensive and expansive to date.

Today is a look at the “almost finished” results.

The Alabama Pilot Project

Accident Study, ages 6-19, school bus crashesAccident Study, ages 6-19, school bus crashes

Average = 85

Obvious conclusion = high variability

in school bus crash data

Estimate Reduction in Fatalities Due to Seat Belts

• Use most recent 10 years. (5 fatalities in Alabama)

• Estimate future fatalities by comparing to national (NHTSA) studies/data.

• Apply school bus seat belt safety factor

• Borrow credible car seat belt safety factors -- 50% for frontal impacts (conservative due to other bus safety features); less effective for side and rear impacts

• As an example:

But there is no school bus safety belt factor!

5 Alabama pupil lives lost in past 10 years. How might have could have been saved with seat belts?

 Estimated Fatalities

% saved by belts

Est. Lives Saved

Front 2.05 50% 1.02

Side 0.69 20% 0.14

Non Collision 0.02 20% 0.00

Rear 2.21 20% 0.44

Top/Bottom 0.02 20% 0.00

Total 5.00   1.60

Seat Belt Use = 90%= 75%= 50%= 25%

1.441.200.800.40

Now account for seat belt use rate AL rate 63%

Capacity Study

Seat widths, thicknesses, and spacing

Will changes in seat configuration and spacing cause a loss of school bus capacity?

Capacity – based on human seat width

• 13” = 10 year old• 15” = 14 year old

male• 18” = 18 year old

male

SOURCE - Child Anthropometry for Restraint System Design. June 1985 University of Michigan, Ann Arbor

39”

What is the trend in pupil body size over

the last 25 years?

Capacity Loss

Now: 3/3 seats (each 39” wide), 12 rows = 72 elementary, 48 middle or high school

With Seat Belts: 3/2 seats (45”/30”), 12 rows = 60 elementary, 36 to 48 middle /high school

• Installing seat belts will not overload all buses.

• Some buses do not currently carry a full load.

• For buses that are overloaded, some pupils can go to other routes.

• Possible result: need somewhere between 3 and 20% more buses.

Wow! We will need a lot more school buses!

One Possible SolutionFlexible Seating

Seat fits 3 elementary or 2 middle/high school

(minimum of 40 pounds and four years of age)

(maximum of 70 pounds in center position)

Problem solved….or maybe not……….

Another Issue – Thicker Seat Backs Seat padding is thicker, going from 3” thick to 5”-7”

= less leg room? = loss of one row?

Possible solution: Lengthen bus a couple of feet and move rear axle back.

But changing rear axle changes bus handling = larger turning radius, rear bumper drag, crushed

tailpipes, etc.

Other Cost and Capacity Reduction Studies

Study Cost per BusCapacity

ReductionNHTSA Report to Congress ’02 $2,440 to $3,550 17%

Indiana School Bus Study ’05 - 0 to 33%

NC School Bus Study ’07 $7,700 8 to 17%

CRS Report to Congress ’07$8,000 to $15,000

16 to 33%

Texas Leg. Budget Study ’09$9,300 to $14,000

-

Alabama Capacity InvestigationDOE Survey

• 30% of current bus routes and pupil loadings, by school age group, by order of schools serviced

• Four seating configurations investigated 1) Current 3/3 seating with 12 rows

2) 3/3 seating with 11 rows; approximates flexible seating and thicker seat backs.

3) 3/2 seating with 12 rows; lose one seat per row.

4) 3/2 with 11 rows; lose one row and one seat/row

• Determine % current buses with insufficient capacity after seat belt installation

Alabama Capacity Investigation Results with Seat Belt Installation

Seat/RowConfiguration

Buses Not Meeting Capacity

3/3 - 12 rows 68 (3%)3/3 - 11 rows 365(16%)3/2 - 12 rows 145 (6%)3/2 - 11 rows 445 (20%)

Estimated Error 2% or LessMany buses are overloaded by only a few pupils

UTCA Evaluation of Seat Belt Use

1) Opinions Of Stakeholders

Parents, students, drivers, principals, and supervisors.

2) Observation Of Pupils

Statement StronglyAgree

Agree Neither DisagreeStronglyDisagree

Bus, now safe – crashes 40% 50% 4% 4% 2%

Bus, now safe – bullying 27% 42% 13% 13% 5%

Belts: make trip safer 54% 28% 11% 3% 4%

Belts: less bullying 45% 28% 13% 9% 5%

Belts: better discipline 36% 34% 15% 9% 6%

My child buckles up in my car 75% 20% 4% 1% 1%

PARENT’S OPINIONS(prior to installation)

Parents are more concerned about discipline than safety

EXPECTATIONS FOR SEAT BELT USEWho is responsible for pupils’ use of belts on bus?

Parents – negative comments

• It will take a whole lot longer in getting off the bus.

• I have concerns about how the belt fits on my child who is small. She says it rubs her neck.

• I believe seatbelts could cause serious injury to the students.

• I do not believe safety belts will alter behavior.

• Getting out in case of fire. Being pinned with seat belts.

COMMENTS AND CONCERNS

Principals

• If belts are used discipline should improve. The parents are the ones to instill this habit in children.

• I whole-heartedly believe lap/shoulder belts would have a major (positive) impact on student safety.

COMMENTS AND CONCERNS

COMMENTS AND CONCERNSDrivers/Aides

• Seats are entirely too high. Can't see students especially middle school & elementary.

• Very hard for a driver to make sure that the student will keep them on. There has to be an aide.

• My concern is if the bus were to catch on fire or end up in a body of water or some other extreme disaster, I would not be able to get all children out of their belts.

COMMENTS AND CONCERNS

Supervisors

• High & middle school students will have difficulty fitting because of limited space on the seat.

• No way to make sure all students will use the seat/lap belts. The driver cannot be held responsible.

• School buses are the safest vehicles with or without seat belts.

Perspective

Change is good. You go first.

Dilbert

WHAT YOU HAVE BEEN WAITING WHAT YOU HAVE BEEN WAITING FORFOR No… No… not the end of my talknot the end of my talk No… No… not lunchnot lunch

Seat Belt Use RatesSeat Belt Use Rates

School Bus Seat Belt Use Observations (2008-09)

BusPupils

ObservedProper

UseImproper

Use Not used

Bus A 24,851 88% 7% 5%

Bus B (Aide) 6,705 71% 15% 14%

Bus C (Aide) 2,093 59% 2% 39%

Bus D (Aide) 838 95% 3% 3%

Bus E (Aide) 1,353 16% 3% 81%

Bus F 12,984 39% 3% 58%

Bus G 81 9% 3% 89%

Bus H (Aide) 1,742 79% 5% 16%

Bus I 5,438 5% 2% 93%

Bus J (Aide) 3,588 59% 20% 22%

Bus K 3617 73% 24% 2%

Bus L 952 21% 6% 74%

Total 64,242 40,351 5,023 18,870

Biggest Finding

Biggest Finding

Extreme Bus to

Bus Variability

Extreme Bus to

Bus Variability

Seat Belt Used Appropriately, Seat Belt Used Appropriately, 2008-10 School Years2008-10 School Years

AL Rate ~ 63% to 64%

Effect of Driver/Aide on Seat Belt Use Rates

Clear Effect of Driver – seatbelt use rate is almost always close to the driver’s rating. Effect of Aide – mixed, seatbelt rate is often close, but 2/3 of aide ratings < belt rate.

FURTHER INFORMATION (1) – There were five instances where a bus driver changed during the study. For four of them, there was an extreme change in use of seats.

FURTHER INFORMATION (2) – The extreme influence of the bus driver on

seat belt use overwhelmed data changes for other aspects of the study, such as the

effect of pupil ages on belt use rates.

Seat Belt Use PhotosSeat Belt Use Photos

Some Good, Some Not so Good……

UA Graduate and Undergraduate Research Assistants have made

over 150,000 observations of seat belt use by individual pupils

And they would like to share a few of their favorites!

• xx

Inappropriate use, even if belted,

causes torso twist during impact

Bowling Practice?

Just Stretching?

Flex seats are very comfortable

Summary of “Intermediate” Results

• School buses are already they safest way to transport pupils to school

• Changing seat and seatbelt systems will cost money• Changing to seatbelts will reduce school bus capacity

– Four configurations were tested with current pupil loads– 3% to 20% of buses will be overloaded after belts are

installed, depending on the configuration• About 63-64% of Alabama pupils used seat belts

appropriately

Summary of “Intermediate” Results (cont’d)

• Drivers have great effect on seat belt use rates; aides have a lesser effect

• Drivers are less able to see pupils when a seat belt system is installed

• A cost-effectiveness study in progress

• Decision: How should scarce safety dollars be spent?

Leaders Work HardLeaders Work Hard

• “Genius is 99% perspiration and 1% inspiration.”

• “Most people miss opportunity because it comes dressed in overalls and looks like hard work.”

Thomas Edison

Our Opportunity

Our Challenge

Our Challenge: work as hard and as smart as we can to transport pupils safely and

efficiently

We can and we will do it!

Have a safe trip home!